X-Git-Url: https://code.communitydata.science/cdsc_reddit.git/blobdiff_plain/4ec9c1424711eb81edf6b6431d5dfae360013174..529b7f051133df6cccd3fbf360f8b196bf5b5996:/submissions_2_parquet_part2.py

diff --git a/submissions_2_parquet_part2.py b/submissions_2_parquet_part2.py
index 1708548..b88764b 100644
--- a/submissions_2_parquet_part2.py
+++ b/submissions_2_parquet_part2.py
@@ -4,22 +4,20 @@
 
 import pyspark
 from pyspark.sql import functions as f
-from pyspark.sql.types import *
-from pyspark import SparkConf, SparkContext
-from pyspark.sql import SparkSession, SQLContext
+from pyspark.sql import SparkSession
 import os
 
 spark = SparkSession.builder.getOrCreate()
 
 sc = spark.sparkContext
 
-conf = SparkConf().setAppName("Reddit submissions to parquet")
+conf = pyspark.SparkConf().setAppName("Reddit submissions to parquet")
 conf = conf.set("spark.sql.shuffle.partitions",2000)
 conf = conf.set('spark.sql.crossJoin.enabled',"true")
 conf = conf.set('spark.debug.maxToStringFields',200)
 sqlContext = pyspark.SQLContext(sc)
 
-df = spark.read.parquet("/gscratch/comdata/output/reddit_submissions.parquet_temp")
+df = spark.read.parquet("/gscratch/comdata/output/reddit_submissions_by_subreddit.parquet")
 
 df = df.withColumn("subreddit_2", f.lower(f.col('subreddit')))
 df = df.drop('subreddit')
@@ -31,12 +29,16 @@ df = df.withColumn("Day",f.dayofmonth(f.col("CreatedAt")))
 df = df.withColumn("subreddit_hash",f.sha2(f.col("subreddit"), 256)[0:3])
 
 # next we gotta resort it all.
-df2 = df.sort(["subreddit","author","id","Year","Month","Day"],ascending=True)
-df2.write.parquet("/gscratch/comdata/output/reddit_submissions_by_subreddit.parquet", partitionBy=["Year",'Month'], mode='overwrite')
+df = df.repartition("subreddit")
+df2 = df.sort(["subreddit","CreatedAt","id"],ascending=True)
+df2 = df.sortWithinPartitions(["subreddit","CreatedAt","id"],ascending=True)
+df2.write.parquet("/gscratch/comdata/output/reddit_submissions_by_subreddit.parquet2", mode='overwrite',compression='snappy')
 
 
 # # we also want to have parquet files sorted by author then reddit. 
-df3 = df.sort(["author","CreatedAt","subreddit","id","Year","Month","Day"],ascending=True)
-df3.write.parquet("/gscratch/comdata/output/reddit_submissions_by_author.parquet", partitionBy=["Year",'Month'], mode='overwrite')
+df = df.repartition("author")
+df3 = df.sort(["author","CreatedAt","id"],ascending=True)
+df3 = df.sortWithinPartitions(["author","CreatedAt","id"],ascending=True)
+df3.write.parquet("/gscratch/comdata/output/reddit_submissions_by_author.parquet2", mode='overwrite',compression='snappy')
 
 os.remove("/gscratch/comdata/output/reddit_submissions.parquet_temp")